It is always so much fun when you’re out in the world, or even in an instance, and mobs are able to spot, target, and shoot you through solid walls. Not only that, they are able to run straight through those walls to get to you! And sometimes, they even die inside the walls. I also have been attacked by mobs that are literally shooting me from underground, with none of their body exposed.
Seen this in Scarlet Monastery, the elite troll area in the Hinterlands, and Western Plaguelands for sure.